I am currently trying to teh knit the nantastket pattern from Berroco free pattern. I am so confused.

Work 17 stitches join another hank of yarn and bind off center 11 sts, work to end. Working both sides at once dec 1 stitch at each neck edge every RS row 3 times. Work even on 14 sts each side until armholes measure 41/2 inches, end on WS bind off.

I do not understand how to do any of that. How do I join another hank of yarn . I don't understand the dec 1 sticth at every neck edge every RS row 3 times.